Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,493 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 202.81.0.0/22 | 1k | APNIC |  CN | 14th Apr 2011 |
| 202.81.16.0/20 | 4.1k | APNIC |  US | 9th Jul 2010 |
| 202.81.192.0/20 | 4.1k | APNIC |  IN | 21st Nov 2000 |
| 202.83.252.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.83.4.0/22 | 1k | APNIC |  HK | 21st Sept 1995 |
| 202.84.0.0/22 | 1k | APNIC | CN | 21st Mar 1995 |
| 202.84.22.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.84.24.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.84.4.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.84.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.85.248.0/21 | 2k | APNIC | HK | 21st Sept 1995 |
| 202.86.16.0/21 | 2k | APNIC |  AU | 28th Sept 2004 |
| 202.86.224.0/20 | 4.1k | APNIC |  JP | 4th Oct 2004 |
| 202.86.24.0/21 | 2k | APNIC |  BN | 28th Sept 2004 |
| 202.86.248.0/24 | 256 | APNIC |  SG | 1st Feb 2006 |
| 202.86.249.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.86.250.0/24 | 256 | APNIC | AU | 3rd Mar 2006 |
| 202.86.252.0/22 | 1k | APNIC | CN | 14th Apr 2011 |
| 202.86.4.0/22 | 1k | APNIC | US | 14th Mar 2006 |
| 202.87.192.0/20 | 4.1k | APNIC |  ID | 22nd Sept 2000 |
| 202.87.224.0/20 | 4.1k | APNIC | JP | 13th Oct 2004 |
| 202.87.28.0/22 | 1k | ARIN | US | 3rd Feb 2025 |
| 202.87.64.0/20 | 4.1k | APNIC | JP | 4th Oct 2004 |
| 202.87.80.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |
| 202.88.200.0/22 | 1k | APNIC | HK | 5th Oct 1995 |
| 202.88.204.0/22 | 1k | APNIC | HK | 24th Nov 1995 |
| 202.88.32.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 202.88.44.0/22 | 1k | APNIC |  NZ | 23rd Nov 2015 |
| 202.89.108.0/22 | 1k | APNIC | CN | 29th Oct 2015 |
| 202.89.119.0/24 | 256 | APNIC | CN | 9th Jun 2016 |
| 202.89.128.0/20 | 4.1k | RIPE NCC |  DE | 5th Nov 1999 |
| 202.89.248.0/22 | 1k | APNIC |  KR | 12th Apr 2006 |
| 202.89.8.0/21 | 2k | APNIC | CN | 12th Apr 2011 |
| 202.9.160.0/23 | 512 | APNIC | IN | 28th Jan 2000 |
| 202.9.163.0/24 | 256 | APNIC | IN | 28th Jan 2000 |
| 202.9.32.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.9.33.0/24 | 256 | APNIC | AU | 5th Dec 2003 |
| 202.9.34.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.9.48.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.9.51.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.9.52.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.9.54.0/24 | 256 | APNIC | CN | 14th Apr 2011 |
| 202.9.57.0/24 | 256 | APNIC | CN | 20th Feb 2012 |
| 202.9.58.0/23 | 512 | APNIC | CN | 14th Apr 2011 |
| 202.9.68.0/24 | 256 | APNIC | AU | 16th Aug 2018 |
| 202.9.70.0/23 | 512 | APNIC | SG | 29th Apr 2010 |
| 202.9.82.0/24 | 256 | APNIC | HK | 18th May 2010 |
| 202.9.86.0/24 | 256 | APNIC | SG | 24th May 2010 |
| 202.9.92.0/23 | 512 | APNIC | IN | 31st May 2010 |
| 202.90.112.0/20 | 4.1k | APNIC | CN | 12th Apr 2011 |